The game will be printed in English, but backers have started translations in a lot of languages! Check the comment/updates to see those. They are also being posted on BGG. So far Dutch, French, Hungarian, Italian, German.
The box sleeve is our only Kickstarter Exclusive. We will not have any further KSE in this project. We want everyone who gets our game to have the same experience, whether that is on KS or in retail. We are such a small company, everyone can not possibly know about our campaign, when they hear about how great this game is, we want them to have the same experience as the rest of us.
If you want to support us in retail, we understand! Please support your FLGS! We think once you see this box sleeve in person, you will be glad you backed on Kickstarter. Not to mention the stretch goals, we need support to unlock those as we have some really great things we want to add to the game!
Don't see the answer to your question? Ask the project creator directly.